richness vs rich

richness and rich both are nouns.

Word	Noun	Adjective	Verb	Adverb
richness	Yes	No	No	No
rich	Yes	Yes	No	No

richness (noun)	rich (noun)
a strong deep vividness of hue	people who have possessions and wealth (considered as a group)
the property of a sensation that is rich and pleasing
the property of producing abundantly and sustaining vigorous and luxuriant growth
the property of being extremely abundant
splendid or imposing in size or appearance
the quality of having high intrinsic value
abundant wealth

richness (adjective)	rich (adjective)
	possessing material wealth
	having an abundant supply of desirable qualities or substances (especially natural resources)
	suggestive of or characterized by great expense
	high in mineral content; having a high proportion of fuel to air
	causing indignation due to hypocrisy
	affording an abundant supply
	strong; intense
	marked by great fruitfulness
	pleasantly full and mellow
	marked by richness and fullness of flavor
	containing plenty of fat, or eggs, or sugar
	of great worth or quality
	very productive